Theory of Machines Free Test - Set 26

Practice Test: Question Set - 26

(A) The power
absorbed in operating the piston valve is less than D-slide valve.

(B) The wear of
the piston valve is less than the wear of the D-slide valve.

(C) The D-slide
valve is also called outside admission valve.

(D) All
of the above

Answer: Option D

2. The
essential condition of placing the two masses, so that the system becomes
dynamically equivalent, is (where l₁ and l₂ = Distance of two
masses from the centre of gravity of the body, and kG= Radius
of gyration of the body)

(A) l₁ = kG

(B) l₂ = kG

(C) l₁l₂
= kG

(D) l₁l₂
= kG²

Answer: Option D

3. The tendency of a body to
resist change from rest or motion is known as

(A) Mass

(B) Friction

(C) Inertia

(D) Resisting force

Answer: Option C

4. The example of rolling pair
is

(A) Bolt and nut

(B) Lead screw of a lathe

(C) Ball and socket joint

(D) Ball
bearing and roller bearing

Answer: Option D

5. For low and
moderate speed engines, the cam follower should move with

(A) Uniform velocity

(B) Simple
harmonic motion

(C) Uniform
acceleration and retardation

(D) Cycloidal
motion

Answer: Option B

6. The driving
and driven shafts connected by a Hooke's joint will have equal speeds, if

(A) cosθ = sinα

(B) sinθ = ± tanα

(C) tanθ = ± cosα

(D) cotθ = cosα

Answer: Option C

7. In a
locomotive, the resultant unbalanced force due to the two cylinders along the
line of stroke, is known as

(A) Tractive
force

(B) Swaying
couple

(C) Hammer blow

(D) None of
these

Answer: Option A

8. The power
transmitted by a belt is maximum when the maximum tension in the belt is
_________ of centrifugal tension.

(A) One-third

(B) Two-third

(C) Double

(D) Three
times

Answer: Option D

9. In order to give a complete secondary
balance of a multi-cylinder inline engine,

(A) The algebraic sum of the secondary forces
must be equal to zero

(B) The algebraic sum of the couples about any
point in the plane of the secondary forces must be equal to zero

(C) Both (A) and (B)

(D) None of these

Answer: Option C

10. A body will
begin to move down an inclined plane, if the angle of inclination of the plane
is ________ the angle of friction.

(A) Equal to

(B) Less than

(C) Greater than

(D) None of
these

Answer: Option C

11. A shaft
carrying three rotors will have

(A) No node

(B) One node

(C) Two nodes

(D) Three nodes

Answer: Option C

12. When a ship travels in a sea,
which of the effect is more dangerous

(A) Steering

(B) Pitching

(C) Rolling

(D) All of the above

Answer: Option B

13. Peaucellier’s mechanism has

(A) Eight links

(B) Six
links

(C) Four links

(D) Twelve
links

Answer: Option A

14. The
magnitude of linear velocity of a point B on a link AB relative
to point A is, (Where ω =
Angular velocity of the link AB)

(A) ω ×
AB

(B) ω ×
(AB)²

(C) ω² ×
AB

(D) (ω ×
AB)²

Answer: Option A

15. The periodic
time is given by (where ω = Angular velocity of the particle in rad/s)